chapter 9 review

chapter 9 review - Lecture 8 Chapter 9: Photosynthesis...

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Lecture 8 – Chapter 9: Photosynthesis – Capturing Energy A. Physical Properties of Light Light consists of particles called protons that move as waves Electromagnetic spectrum: vast, continuous range of radiation Visible light: 380 nm (Violet, short wavelength) – 760 nm (Red, longer wavelength) Photons with shorter wavelengths have more energy than those with longer wavelengths Pigments are substances that absorb visible light, photons of a certain wavelength White When molecule absorbs a photon of light energy, one of its electrons becomes energized atom may return to its ground state – all electrons are in their normal, lowestenergy levels; its energy dissipates as heat (fluoresence) energized molecule B. Chloroplast Photosynthesis occurs in chloroplasts, which are located mainly within mesophyll cells inside the leaf Chloroplasts are organelles enclosed by a double membrane The inner membrane encloses the stroma in which membranous, saclike thylakoids are suspended Each thylakoid encloses a thylakoid lumen Thylakoids arranged in stacks called grana ATP is formed when hydrogen ions leave the thylakoid lumen C. Chlorophyll Pigment involved in photosynthesis does not absorb green light ring structure with long carbon tail
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at center of ring is magnesium chlorophyll
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chapter 9 review - Lecture 8 Chapter 9: Photosynthesis...

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